Intrathecal Morphine Use Improves Postoperative Analgesia and Reduces Opioid Consumption in Patients Undergoing Total Knee Arthroplasty Under Spinal Anesthesia: A Retrospective Study.

Cureus · 2023 · PMC10479995 · PMID 37674945

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did not reach statistical significanceno p-value reported

Some results like ambulation distance were clinically significant but did not reach statistical significance due to the small sample size.

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